“I don't think I would be the first working mom bringing my baby with me everywhere,” she said.

Kirk, who suffered a stroke in 2012, plans to run for re-election.

"Senator Mark Kirk is an independent voice for Illinois and is proud of his bipartisan record of achievement in the United States Senate," Kirk spokeswoman Alissa McCurley said in a statement. "While he looks forward to a vigorous campaign, the Senator believes there will be plenty of time for politics, and he is focused on fighting for veterans who have not received the treatment and respect they have earned from our government, as well as advocating for policies that encourage economic growth and job creation.”